How to know which nuget packages to deploy with our application?

[stevenbrix]

Hey, sorry if this has been answered somewhere or in some documentation, but I haven't not been able to find it. We have a Swift application which is using the C APIs for running onnx models on device. Loading and running the models is no problem, but I've noticed some output from the runtime commenting that my Snapdragon Elite X CPU isn't recognized. A quick google search tells me that I should likely be using the Microsoft.ML.OnnxRuntime.QNN package for this device. This is where my confusion begins...

When looking at the Nuget gallery, I see many numerous Nuget packages with the various suffixes related to the EP (i.e. *.GPU, *.QNN, etc) and when i look in them, they all have the same binary named onnxruntime.dll and some other perhaps specific binaries. So my question is:

1. Are these onnxruntime.dll binaries all the same between these packages?
2. If not, then it seems like our installer has to be smart about which device it's installing on and install the correct binaries. Is that correct?
3. If they are the same, then is it reasonable to put all possible binaries into our apps payload and choose the appropriate EP at runtime based on the device?